Heater



FIG. 1 is a perspective view of a heater, showing a first embodiment of my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a perspective view showing the heater in a alternative environment;

FIG. 8 is a perspective view showing the heater in another alternative environment;

FIG. 9 is a perspective view showing the heater in another alternative environment;

FIG. 10 is a perspective view showing the heater in another alternative environment; and,

FIG. 11 is perspective view showing the heater in another alternative environment.

Wherein, the broken lines are shown for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a heater, as shown and described. 